Transparent knob for percolators



July 6, .1954 L. P. PAWLEY 2,682,828

TRANSPARENT KNOB FOR PERCOLATORS Filed March 51, 1950 INVENTOR' LEON P2P4 WL EY E-lfl BY Patented July 6, 1954 UNITED STAT 3;,

1 Claim. (Cl. 99285) The present invention relates to a device to beused in combination with a vessel or container of the percolator type inwhich is brewed coffee, tea or other liquids.

It isan object of the present invention to provide a transparent knobadapted for engagement with the lid of a vessel of the percolator type.

Another object of the present invention is the provision of atransparent knob having means associated therein that will allow thebrew to pass into the knob and temporarily retain the brew in the knobin orderthat the color of the brew may be viewed.

A still further object of the present invention is' the provision of atransparent knob for use with a percolator that may be made of glass,plastic, rubber or any other suitable material.

A still further object of the present invention is the provision of adevice adapted for use with a knob of a percolator that may be wedged,screw threaded or gasketed therein.

A still further object of the present invention is the provision ofmeans on the device for assisting in removal of the device from theknob.

A still further object of the present invention is the provision of atransparent device adapted for engagement with the lid of a percolatorthat may be of unitary structure.

In order to make the invention more clearly understood there are shownin the accompanying drawing means for carrying the same into practicaleffect, without limiting the improvements, in their useful applications,to the particular construction which, for the purpose of explanation,have been made the subject of illustration.

In the drawing- Figure 1 is an elevational view of a glass knob usedwith a percolator type of vessel.

Figure 2 is a bottom plan view of Figure 1.

Figure 3 is a sectional view taken on line 3-3 of Figure 1, illustratingthe device positioned in a glass knob. Figure 4 is a sectional view of adifferent type of glass knob and showing the present device providedwith V-shaped drain channels.

Figure 5 is a bottom plan view of Figure 4.

Figure 6 is a sectional view of the present device made of rubber andhaving a flange or gasket that is provided with drain apertures.

Figure '7 is a bottom plan view of Figure 6.

Figure 8 is a modified form of the device.

Figure 9 is another modified form of the device and showing screwthreads.

Figure 10 is a bottom plan view of Figure 9.

Figure 11 is another modified form of the invention, and

Figure 12 is a further modified form of the device.

Similar reference characters refer to similar parts throughout thedrawing.

Referring to the drawing, and as illustrated in Figures 1 to 3, thenumeral [5 represents a glass knob usually associated with the lid of avessel of the percolator type, the glass knob being secured in a lid(not shown) by projections IS, the flange I1 engaging the top surface ofa lid. Within the glass knob there is positioned a substantiallycone-shaped element l8 having its base [9 flared, the base beingprovided with vertical drain apertures 20, that serve as outlets for aliquid within the knob l5 and represented by dotted lines 2|. Thesubstantially coned shaped element It has a through bore 22 that permitsthe entrance of liquid into the glass knob I5 during a brewingoperation. The base i9 is provided with integrally formed depending lugs23 that serve as an engagement means for fingers,

or other suitable means for removing the element i8 from the glass knobit after the brewing operation.

In Figures 4 and 5 the numeral 25 represents a glass knob of differentconfiguration than the 7 glass knob I 5, and within the glass knob 25there is positioned a coned shaped element 28 having a through bore 2'!that admits liquid into the glass knob 25. In the wall of the conedshaped rubber, aluminum or other suitable material and it has a throughbore 3| and a flange or gasket 32. The gasket is provided with aplurality of drain apertures 33, and depending from the base of theelement 30 are integrally formed lugs 34.

Figure 8 shows a modified form of the element to be associated with aglass knob and it comprises a cylindrical body 40 having a through bore4i and a flanged base 42, the base being provided with a plurality ofdrain apertures 53 and depending lugs 23. i

In the form of the invention shown in Figures 9 and 10, the element 50is amodified form and it comprises a base 5!, the peripheral edge ofwhich is provided with threads 52 that engage threads 53 in the sidewall of the glass head 54. The element 50 has a through bore 55, the

3 walls 55 of which are curved to the outlet opening 51. The base 5| isprovided with vertical drain apertures 58 and depending lugs 59, thedrain apertures allowing liquid to drain from the element 50.

In the modified forms of the invention shown in Figures 11 and 12 abushing 60 is provided for engagement with glass knobs of differenttypes, the bushings being provided with drain bores 6|. The peripheraledge of the bushing is provided with threads 62 and the inner peripheralwall of the bushings are provided with threads 63. In Figure 11, thethreads 62 engage threads 65 of the glass knob 66, while threads 63engage threads 61 on element 68. The element 68 has a through bore 69,angularly disposed drain bores 10 and lugs 23.

In Figure 12 the threads 62 of the bushing 60 engage threads 15 of theglass knob 16, while the threads 63 receive threads 11 of element 13.Element 18 is provided with a through bore '19 and it is to be notedthat this bore is of bell shape configuration, the base of element 13being provided with the depending lugs 23.

In the use of the elements 8 and 26, the elernents are inserted into theglass knobs l5 and until the base of each of the elements l8 and 2 6 arein alignment with the respective bases of the glass knobs i5 and 25. Asa liquid is brewed it will pass up through the bores 22 and 21 as shownby the arrows into the glass knobs i5 and 25. As the liquid continues tobe brewed, as an example coifee, the color of the liquid will change andthe change can be viewed by the maker. During the brewing and while theliquid due to the heat pressure built up in the percolator, passes intothe glass knobs l5 and 25 a certain level of the liquid in the glassknobs will be maintained due to the restricted size of the drainapertures 29 and 28.

In using the element 39 the element is forced into a glass knob, theflange or gasket 32 engaging the inner Wall of the knob, thus securingthe element 36 in fixed position.

In using the element 50, it is simply screwed into the glass knob 55,the lugs 59 serving as the elements to be engaged when disconnecting theelement 5| from the glass knob 54'.

In Figures 11 and 12 the bushing is first screwed into the glass knobs66 and F6. The elements 68 and 7B are then screwed into the bushings G0,removal of the elements 68 and 18 being efiected by engagement with thelugs 23.

In view of the fact that elements 30, 40, 50, 6B and '58 operate as theelements is and 26 no fur ther description of these elements is believednecessary.

I am aware that changes may be made and numerous details of constructionvaried without departing from the principles of this invention, and Itherefore do not wish to limit to the exact showing, it being obviousthat changes may be made without departing from the spirit of theinvention.

What is claimed is:

In a cofiee making device of the type in which the water is elevated toa percolator basket through a fountain tube, the combination of a lidwith a transparent indicator, an insert in said indicator havin meansthereon to engage said indicator, means in said insert to allow pas sageof coffee from said fountain tube, means to entrap a portion of saidcoffee, and restricted vents in said insert to drain said coffee back tosaid percolator basket.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 123,258 Goodrich 1-11 1 Jan. 30, 1872 566,593 Babin 1- Jan.22, 1901 690,310 McBride Dec. 31, 1901 772,498 Chapman et al Oct. 18, i851,417 Heinrichs 1-; Apr. 23, 1907 860,272 Warner July 16, 190?1,056,049 Nelson Mar. 18, 1913 1,202,977 Drake Oct, 31, 1916 1,486,943Bates Mar. 18, 1924 1,717,963 Denny June 18, 1929 1,756,491 Marsh 1 Apr.29, 1930 1,976,658 Deuring 1 Oct. 9, 1934 2,181,251 Tufts Nov. 28, 19392,186,987 Nesset 1.1 Jan. 16, 1940

